Tabor Electronics 5251, Руководство пользователя

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ArbConnection
Generating Waveforms Using the Equation Editor
3-63
Time/Level Points – programs pulse turning points using level and
time markers. This format is a bit more complex to use however, it
allows pulse design that require linear transition times. For
example, if you want to draw a simple square waveform that has 0V
to 3.3V amplitude, 50% duty cycle, 1ms period and 100ns transition
times, you enter the following parameters:
Index = 1, Level = 0, Time interval = 0, (Cumulative Time = 0)
Index = 2, Level = 3.3, Time Interval = 0.1, (Cumulative Time = 0.1)
Index = 3, Level = 3.3, Time interval = 0.4, (Cumulative Time = 0.5)
Index = 4, Level = 0, Time interval = 0.1, (Cumulative Time = 0.6)
Index = 5, Level = 0, Time interval = 0.4, (Cumulative Time = 1.0)
Note as you build the segments that the pulse is being drawn on the
screen as you type in the parameters and the specified point is
marked with a red dot. Also note that the Cumulative Time column
is updated automatically with the cumulative time lapse from the
start of the pulse.
Section Structure
The term Section Structure is used to define part of the pulse train
that share common properties. There are four parameters that can
be programmed in this group: Index, Level, Time Interval and
Cumulative Time.
Index – Is added automatically as you program pulse segments.
The index line is highlighted as you point and click on pulse
segments on the pulse editor screen.
Level – Specifies that peak level of the programmed segment. As
you build the pulse, the level window is expended automatically to
fit the required amplitude range. Note however, there is a limit to the
level, which is being determined by the generator’s peak to peak
specification.
Time Interval – Specifies the time that will lapse for the current
index level. You can program the time interval and the cumulative
time will be adjusted accordingly.
Cumulative Time – Specifies the time that will lapse from the start of
the current pulse section. You can program the cumulative time and
the time interval will be adjusted accordingly.
Section Properties
The Section Properties contains a summary of properties that are
unique for the current section.
Design Units – Provide information on the units that are used when
you draw the pulse segments. These units can be changed in the
pulse editor options.
Section Start – Provides timing information for the start of the
current section. If this is the first pulse section the value will always
be 0. Subsequent sections will show the start mark equal to the end
mark of the previous section.